Respuestas

2012-10-17T05:35:01+02:00

x=(26-19)/4

x=7/4

...

17x-3x=-5-15

15x=-20

x=-20/15

2012-10-17T05:36:05+02:00

4x+19=26

4x=26-19

x=7/4

 

17x+15=3x-5

17x-3x=-5-15

14x=-20

x=-20/14

x=-10/7